names = ['fesine','soly','pactera']
scores = [80,75,95]
d={'fesine':80,'soly':75,'pactera':95}
print(d['pactera'])
d['davaid']=60
print(d['davaid'])
print('sum' in d)
print(d.get('sum',-1))
print(d.get('soly',-1))
d.pop('fesine')
print(d)